Unless Real Model has greatly improved his products, I'd steer well clear of anything of his....years ago, I'd ordered his M800 series 5 ton truck conversion as well as the M800 series wheel/tire set...about a month to arrive, so I had time to work on the Italeri 5 ton truck that was the donor kit.
Well, the RM products arrived, and were UNUSABLE. Poorly cast copies of AFV Club M35 parts for the cab, and the rest of the fuel tanks, air tanks, all the details, and the wheel set were BLOBS of resin...looked like someone had taken all the details, superglued leftover casting blocks to then, then RECAST them in work out molds that had been filled with a handful of cat litter!
When I contacted him directly, via his website, I POLITELY, and I do mean politely, told him how bad the products were, and he proceeded to berate me, and claim I wasn't skilled enough to use his wonderful conversion sets! NO offer of replacement of refund, so I replied in kind, dishing out what I had been given...my opinion of him hasn't ever changed. I feel he's as bad as the now-defunct AEF Designs...the products were THAT bad. Having said that, I wish you success, and can only hope his current line is better than what I received. Buyer beware.
Rod